METHOD FOR REGULATING POWER OF DIRECT-DRIVE PERMANENT-MAGNET SYNCHRONOUS WIND POWER GENERATOR SET

摘要

A method for regulating power of a direct-drive permanent-magnet synchronous wind power generator set involves the following steps: A. acquiring the actual speed n of the generator; B. executing step C when n is less than the rated speed, otherwise, executing step D; C. computing the current torque given value M of the generator set, outputting M to the wind generator set when M is not greater than the rated torque, otherwise, assigning the rated torque value to M and outputting M; D. acquiring the last M, executing step E when M is smaller than the rated torque, and executing step F when M reaches the rated torque; E. gradually regulating the torque to the rated torque, and keeping the rotation speed at the rated speed; and F. regulating the power generator set at the rated speed by using a variable pitch system. The method takes the actual air density of the wind field into account, introduces the optimal power regulation coefficient, simplifies the implementation procedure, conforms to the actual working conditions and realizes the real-time optimum efficiency of the power regulation of the wind power generator set in the whole process, thereby overcomes the insufficiencies in the prior regulation method.